In deck blasting, one effect is to create additional delay periods in the borehole. True or false?

In deck blasting, one effect is to create additional delay periods in the borehole. True or false?

• A. True
• B. False
• C. Uncertain
• D. Not specified

Answer: (A)

Deck blasting relies on staged initiation, with charges loaded in decks separated by time delays. By design, this adds extra delay periods inside the borehole so the blast energy is released in steps rather than all at once. That stepped energy release helps control crack development, improve fragmentation, and reduce ground vibration and overbreak. The delay intervals and deck spacing are chosen to match rock conditions and the desired fragmentation, making this a purposeful feature of deck blasting.

Deck blasting relies on staged initiation, with charges loaded in decks separated by time delays. By design, this adds extra delay periods inside the borehole so the blast energy is released in steps rather than all at once. That stepped energy release helps control crack development, improve fragmentation, and reduce ground vibration and overbreak. The delay intervals and deck spacing are chosen to match rock conditions and the desired fragmentation, making this a purposeful feature of deck blasting.